Compared to the mass of our own Milky Way Galaxy, the total mass we estimate for the Andromeda Galaxy is
A) a lot smaller
B) a little bit smaller
C) exactly the same
D) somewhat bigger
E) not something we can measure

Question

Quizplus · Accepted Answer

The Andromeda Galaxy has a total mass estimated to be around 1.5 trillion times the mass of the sun, which is slightly bigger than the estimated total mass of our Milky Way Galaxy of around 1 trillion times the mass of the sun. Therefore, the best choice is D, somewhat bigger.

Compared to the Mass of Our Own Milky Way Galaxy